Method of and apparatus for stock manipulation



NIPULATION Feb.l 9, 1932.

O J. G. RAMsEY METHOD OF AND APPARATUS FOR STOCK Filed Dec. 20, 1928 2 Sheets-Sheet 41` 'ill METHOD 0F AND APPARATUS FOR STOCK MANIPULATION FRoM JoRoAN To ScREEN Patented Feb. 9, 1932 UNITED STATES Parnu-'r OFFICE JAMES G. BAMSEY, 0F W'IIILIVIII'IG'I0N,` DELAWARE, ASSGNOR TO THE JESSUP & MOORE PAPER co., or

sE'r'rs PHILADELPHIA, PENNSYLVANIA, A CORPORATIN OF MASSACHU- VLII'EJIHOI) 0F AND APPARATUS FOR STOCK MANIPULATIGN Application` ledLDecemberO, 1928.' Serial No. 327,359.

This invention` relates, to a method of and apparatusfor `feeding or flowing stock to av refining engine or Fourdrinier wire,or both.`

The particular object of the invention 1s the feeding of stock in such a way as to eliect al suspension in orderfthat a perfect web may be made upon` withdrawal of the suspending medium. y

'It is well known in this art that the raw materialsl which go to make up the paper mustbe thoroughly mixedand carded in a dilute. suspension so,` that the stock may be formed into a homogeneous web which will be uniform and free from lumps, and clots. The beating and` refining must `necessarily take place in a liquid suspension which is fairly thick, usually 4 to5 parts lof? raw material, to make up to 100 parts.4 This suspension `must then-` be thinned tov about one-half ot one part of raw materials to make 100 parts to effect a further suspension, and"` be.- Jfore it can be made to* screen and knit together properly to form a web onthe Fourdrinier wire. It is,therefore, necessary that a: very large volume uof water be supplied to dilutethe thick stock which is being continu-` ously pumped from therefining engine tothe paper machines tobe screened, and to be thereafter separated from the suspending water on the Fourdrinier wire.

A great deal `of difhculty has been eX- perienced in eliminating imperfections in the web..` Many of these imperfections are due to the fact that it is practically impossible to supply stock from the refining machines under aconstant flow, and free from lumps and bubbles. The invention is, therefore, concerned with the elimination of lumps,` froth and foam spots and the productionof a sheet in whichthe regulation ofweight or thickness" is expeditiously controlled.

To this end the invention' consists in the provision of' a stock box` divided. into severalcompartments, one of which is provided with 'an` adjustable measuring vgate. or wier, the stock being supplied to that com partment` faster than it canV flow outfof the gate to the refining machine. Means are 50 provided to.- take care of the overflow from this compartment. Operating on this principle, stock is supplied both to the Jordan and the Fourdrinier under a constant hydrostatic head, with the result that the flow is` absolutely constant as compared with the usual fluctuations `of pump pressure.

The invention further consists in the novel arrangement7 combination and construction` of parts more" fully described hereinafter and shown in the accompanying drawings.

In the drawings o Fig. l is a side elevation partly insection,` showing an embodiment of my invention.

Fig; 2 is a plan View of the arrangement` of Fig. 1.

Fig. 3 is a sectional elevation view along the line 3-3 of Fig. 2.

Fig. 4 is a sectional view along thepline 4-4 of Fig. 2.

Referring now with particularity to the embodiment illustrated, I have shown* at l a box for beaten stock which consists` of sev-` eral compartments. Into a section which I shall term the inflow compartment 2, is arranged an intake or supply pipe 3 through which stock enters from the beater chest.y A partition 4 between the longitudinal walls of the box l but lowerthan the end walls there-l of, is provided, over which spills the stock inflowing through the pipe 3. A similar wall 5, and of substantially the same height as the wall 4, forms therebetween what I shall term` an outflow compartment 6. This compartment lis provided with an aperture 7 closedby an adjustable gate 8 in the usual` manner.

This gate, therefore, isV used to regulate theY amount of stock leaving the outfiow compartment 6.

Between the wail 5 andthe end wall 910i the box l is an overfiow compartment l0 provided with an overflow pipel 1I.

The stock flowing out of the aperture 7 enters the measuring boX` l2* and flows by means of the outlet pipe 13 tov` a refining en'- gine of any desired type,A and which is not here illustrated?.

In operation the stock from the beater chest Vwill be supplied through the pipe 3A to the inflow compartment 2 faster' than it: can flowout of the aperture 7 into the neighboring or intermediate compartment. Obviously the stock reaches this compartment by flowing over the top of the wall 4. Due to this method of feeding the stock, the coinpartment 6 will soon fill to the top and the excess will overflow into the compartment 10 and out through the pipe 11 back to the supply for beaten stoclr. Thus, the stock flowing out of the aperture 7 to the refining engine does so under a constant hydrostatic head and does not depend upon a pump, thereby eliminating the usual fluctuations occurring through the use of such a device.

The fact that the beaten stock has to pass through compartments 2, 6 and 12, as well as pipe 13, before reaching the refining engine, permits any froth or bubbles existing therein to become dissipated, which thus adds to the uniformity of the final web.

This same principle is applied to the de vice used for further diluting the refined stock and flowing the same to the Fourdrinier and intermediate screens.

Such a device may be embodied in a box having a. compartment 14 therein into which White water is supplied through the pipe 15. Suitable baflies 1G are located above the pipe 15 to prevent undue splashing.

Within the compartment 14 1 provide an overflow pipe 16', preferably rectangular in cross-section in order to prevent swirling, the top being at a level above the outlet 17 for the white water. The outlet 17 may also be provided with an adjustable gate 18 so that the size of the opening may be controlled. As before, it is desirable to supply white water to the box 14 faster than this diluting water can flow through the outlet 17. Such being the case, the excess will iiow into the top of the overflow pipe 16 and from there to the wire pit.

At the front of the box 14 I provide a mixing box 19 into which the refined stoel: from the Jordan or other refining engine is supplied, as above set out. The diluting water flowing through the outlet 17 is also discharged into this box.

The side walls 2O of this mixing box overlap in spaced relation the extension 21 of the side walls of the box 14. This causes the thus diluted stock to travel a circuitous path and spill over the top of the wall 2O into the side or screen boxes 22 to reach the openings 23 from which the diluted refined stock flows to the Fourdrinier.

1t will thus be seen that by such an arrangement, the diluted water is supplied under a constant hydrostatic head due to the fact that the inflow through pipe 15 is greater than the outflow through the opening 17, and inasmuch as the height of the overflow pipe 16 is above the outlet 17. This constant supply of diluting water is mixed in the box 19 with a similarly constant supply of relined stock so that the Fourdrinier receives an unfluctuating supply of material.

It is essential that a constant level for both stock and water be maintained in order to produce efficient results.

I claim:

1. A method of feeding stock to a Fourdrinier wire, which includes the steps of maintaining a constant head of stock from a beater to a Jordan, maintaining a constant head of refined stock from the Jordan to a mixing box, maintaining a constant head of diluting water, flowing the diluting water into the mixing box for the refined stock, and flowing the diluted stock to a Fourdrinier.

2. A method ofvr feeding stock to a Fourdrinier wire, which includes the steps of flowing diluting water under a constant hydrostatic head into a mixing box, flowing rened stock under a constant hydrostatic head, also to said box, and flowing the thus diluted refined stock to a Fourdrinier.

3. A method of feeding stock to a Fourdrnier wire, which consists of flowing rened stock into a mixing box, supplying diluting water to a compartment, and flowing said diluting water into said mixing box from said compartment, the water being supplied to the compartment faster than it lcan flow into the mixing box, and overflowing the excess water at a point higher than the outlet into the mixing box, and flowing the thus diluted stock to the Fourdrinier.

4. A beater stock box having an inflow compartment into which stock from a beater chest is supplied, an outflow compartment having an outlet gate therein, said outflow compartment receiving stock from the inflow compartment, an overflow compartment receiving stock from the outiow compartment, a take-o pipe for the overflow compartment and means to supply beater stock to the inflow compartment faster than the stock can pass through the outlet gate of the outiiow compartment.

5. In combination, a mixing and measuring box including a mixingpcompartment, means to supply refined stock thereto, a diluting water compartment, a gate between the two compartments, 'means to supply the water compartment with a greater supply of water than can flow out of said gate into said mixing compartment, an overflow outlet for the water compartment, spaced walls extending from the water compartment on either side of the water gate and over the mixing compartment, the lower ends of said walls being above the bottom of the mixing compartment, the bottom of the mixing compartment being below the bottom of the water compartment, said mixing compartment having side walls between and overlapping said extending walls in spaced relation, and screen boxes one at either side of the said mixing compartment, having outlets to the Fourf drinier whereby the diluted refined stock is caused to travel a circuitous path in passing over the side walls of the mixing box into the screen boxes and thence to the Fourdrinier in unfluctuating supply.

6. In combination, a beater stock box deY livering stock under a constant head to a Jordan, said Jordan delivering a constant flow of refined stock to a mixing box, means delivering a constant head of diluting water to said mixing box, said mixing box 'delivering a constant flow of diluted refined stock to a Fourdrinier.

7. Apparatus according to claim 6, in which said beater stock box has an inflow compartment, an outflow compartment with a gate in its wall to supply a Jordan, an overflow compartment receiving overflow stock from the top of the outflow compartment, and means to supply stock to the inflow compartment faster than the stock can pass through the outlet gate of' the outflow compartment.

8. Apparatus according to claim 6 in which said beater stock box has an inflow compartment, an outflow compartment with a gate in its wall to supply a Jordan, an overflow compartment receiving overflow stock from the top of the outflow compartment, and means to supply stock to the inflow compartment faster than the stock can pass through the outlet gate of the outflow compartment, said means for delivering a constant head of diluting water to said mixing box comprising a ldiluting water compartment providing a gate between the water compartment and mixing box, means to supply the water compartment with a greater supply of water than can flow out of said gate into said mixing box, and an overflow outlet for the diluting water compartment.

9. Apparatus according to claim 6, in

lwhich said beater stock box has an inflow compartment, an outflow compartment with a gate in its wall to supply a Jordan, an overflow compartment receiving overflow stock from the top of the outflow compartment, and means to supply stock to the inflow compartment faster than the stock can pass through the outlet gate of the outflow compartment, said beater stock box having a measuring compartment disposed to receive the stock from the outlet gate, the bottom of said measuring compartment being below the level of the bottom of the outflow compartment.

10. Apparatus according to claim 6, in which said beater stock box has an inflow compartment, an outflow compartment with a gate in its wall to supply a Jordan, an overflow compartment receiving overflow stock from the top of the outflow compartment, and means to supply stock to the inflow compartment faster than the stock can pass through the outlet gate of the outflow compartment, said means for delivering a constant head of diluting water to said mixing box comprising a diluting water compartment providing a gate between the water com partment and mixing box, means to supply the water compartment with a greater supply of water than can flow out of said gate into said mixing box, and an overflow outlet for the diluting water compartment, said overflow outlet comprising a vertical overflow pipe having its upper end above the gate, said pipe being of rectangular crosssection to prevent swirling.

In testimony whereof I affix my signature.

JAMES G. RAMSEY. 

